Shelly EM Gen3

The Shelly EM Gen3 is a compact smart energy monitor designed for easy retrofitting. It tracks single‑phase systems across two channels, includes dry contacts for controlling contactors, and offers built‑in WiFi and Bluetooth for seamless integration with other Shelly devices.

£64.49 inc VAT

SKU: EM-GEN3 Category:

Compatibility

Shelly EM Gen3 is compatible with the following systems:
Wi-Fi Compatible Device

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Description

The Shelly EM Gen3 is a two‑phase energy meter that delivers measurement accuracy within 1% and supports both cloud-based and local data storage. It connects directly to Wi-Fi without the need for an additional hub, and thanks to its Bluetooth capability, it can be added to an existing Shelly network quickly and effortlessly.

This model comes with one 50A current clamp for monitoring circuits up to 50A and can be integrated into smart schedules or automated scenes across other Shelly devices—helping track energy consumption and disable non-essential loads when a predefined usage limit is reached.

Building on the previous-generation Shelly EM, the EM Gen3 features an upgraded, in‑house‑designed chip with 8MB of memory, providing smoother performance and a more responsive user experience.

Key features:

  • Built-in WiFi; no hub required
  • Bluetooth connectivity
  • Embedded web server for local management
  • Dry contact support
  • Power metering
  • Smart schedules
  • Smart scenes
  • Automatic sunrise/sunset schedules
  • Enhanced security (MQTT, WSS and TLS certificate support)

What’s Included:

  • 1 x EM-GEN3
  • 1 x 50A Clamp
  • 1 x Installation guide

Product Specifications

Physical and Performance Attributes

Weight23 grams
Dimensions (L x W x H)37 × 42 × 16 mm

Misc Product Attributes

Category Specification Details
Physical Size (H x W x D) 37 x 42 x 16 mm / 1.46 x 1.65 x 0.63 in
Physical Weight EM Gen3: 23 g / 0.81 oz
CT 50A: 50 g / 1.76 oz
Physical Screw terminals max torque 0.4 Nm / 3.5 lbin
Physical Conductor cross section 0.5 to 4 mm² / 20 to 11 AWG
Physical Conductor stripped length 6 to 7 mm / 0.24 to 0.28 in
Physical Mounting Wall console, Electrical cabinet
Physical Shell material Plastic
Physical Shell color White, Charcoal gray
Physical Connectors color Black
Environmental Ambient working temperature -20 °C to 40 °C / -5 °F to 105 °F
Environmental Humidity 30% to 70% RH
Environmental Max altitude 2000 m / 6562 ft
Electrical Power supply 110 to 240 V~ 50/60 Hz
Electrical Power consumption < 1.2 W
Electrical External protection 2 A, characteristic B or C, 6 kA interrupting rating, class 3
Electrical Max switching voltage 240 V~
Electrical Max switching current 2 A / 240 V~
Sensors and meters Voltmeter (AC) 110 to 240 V~ 50/60 Hz
Sensors and meters Voltmeter accuracy ±2%
Sensors and meters Ammeter (AC) 0 to 80 A
Sensors and meters Ammeter accuracy ±2% (2–50 A), ±2% (1–2 A), ±5% (0–1 A)
Sensors and meters Compatible current transformers CT 50A (included), CT 80A
Sensors and meters Power and energy meters Active/apparent power & energy, PF, fundamental energies
Sensors and meters Channel-to-channel minimum load 500 W
Sensors and meters No load threshold 30 VA per channel
Sensors and meters Data storage At least 10 days (1 min resolution)
Sensors and meters Data export CSV (PQ), JSON (RPC)
Sensors and meters Internal temperature sensor Yes
Radio Wi‑Fi protocol 802.11 b/g/n
Radio Wi‑Fi RF band 2412 to 2472 MHz
Radio Wi‑Fi max RF power < 20 dBm
Radio Wi‑Fi range Up to 30 m indoors, 50 m outdoors
Radio Bluetooth protocol 4.2
Radio Bluetooth RF band 2402 to 2480 MHz
Radio Bluetooth max RF power < 4 dBm
Radio Bluetooth range Up to 10 m indoors, 30 m outdoors
Microcontroller CPU ESP-Shelly-C38F
Microcontroller Flash 8 MB
Firmware Schedules Yes
Firmware Webhooks 20 hooks, 5 URLs each
Firmware Scripting Yes
Firmware MQTT Yes
Firmware Encryption Yes
Firmware Authentication Yes